/*
 * Copyright 2020 Alfresco, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.activiti.engine.impl.el.variable;

import org.activiti.engine.delegate.VariableScope;
import org.activiti.engine.impl.persistence.entity.ExecutionEntity;

public class ProcessInitiatorELResolver implements VariableScopeItemELResolver {

    private static final String INITIATOR_KEY = "initiator";

    @Override
    public boolean canResolve(String property, VariableScope variableScope) {
        return INITIATOR_KEY.equals(property) && variableScope instanceof ExecutionEntity;
    }

    @Override
    public Object resolve(String property, VariableScope variableScope) {
        ExecutionEntity processInstance = ((ExecutionEntity) variableScope).getProcessInstance();
        return processInstance != null ? processInstance.getStartUserId() : null;
    }
}
